Operating Manual EMI TEST RECEIVER ESIB7 - Rohde & Schwarz

External Modulation - Tracking generator
ESIB
External Modulation of Tracking Generator
SYSTEM MODE-TRACKING GENERATOR menu:
MODULATION
MODULATION
EXT AM
EXT ALC
EXT FM
EXT I/Q
The MODULATION softkey opens a submenu for
selecting the different modulation types.
The time characteristic of the output signal of the tracking
generator can be varied by applying external signals (input
voltage range -1 V to +1 V).
The functions for amplitude and frequency modulation and
for external level control are always available.
The function IQ modulation is only available in models of
tracking generators that are equipped with the IQ
modulator (FSE-B9 and FSE-B11).
Two BNC connectors at the rear panel are available as
signal inputs. Their function changes depending on
selected modulation type:
TG-INPUT I / AM / ALC and
TG-INPUT Q / FM
The types of modulation can partly be combined with each other and with the frequency offset function.
The following table shows which modulation types can be selected simultaneously and which can be
combined with the frequency offset function.
Table 4-2
Simultaneous modulation types (tracking generator)
Modulation
Frequency
offset
EXT AM EXT ALC EXT FM EXT I/Q
Frequency offset • • •
EXT AM • •
EXT ALC
•
EXT FM • •
EXT I/Q
• modulations can be combined
1088.7531.12 4.274 E-15